| 摘要 |
PROBLEM TO BE SOLVED: To train the oral movement for food ingestion in a natural posture by setting an angle made by a line which connects the intersecting position of a grasp part with a biting part to the tip part of the biting part and the virtual center line of the grasp part to be a specified angle. SOLUTION: A virtual center line C in a longitudinal direction is assumed in the grasp part 11, and the grasp part 11 land the biting part 12 are intersected at a part 0 on the virtual center line C. Then the angle made by the line segment S which connects the tip part Q of an extension part 12d in the biting part 12 to the intersecting part O and the virtual center line C is made to beθ. The angleθis the sum of the right angleθ1 between a horizontal line H passing the part O and the virtual center line C and the angleθ2 made by the horizontal line H and the segment S. It is favorable thatθ2 is 0 deg. or more and equal to or below 60 deg. for an inserting operation to a mouth. Therefore, the angleθis set to be within a range from 90 deg. to 150 deg.. Then the training of the oral movement for food ingestion is executed in the natural posture.
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